Build a Reactor Codes

All current and previous game codes for Build a Reactor on Roblox.

Last checked for codes:17 hours agoat Times shown in UTC
Checked byNicole LuceroCode Guardiansince 2026
Game thumbnail for Build a Reactor1 active0 expired
How to Claim CodesStep-by-step guide
Case Sensitive CodesType them exactly as shown
CodeDescriptionStatusWorks
RELEASE901
This code credits your account with 50,000 Cash.Active

How to claim codes in Build a Reactor

First, click the Store button on the left side of the screen:

The Store button in Build a Reactor

Scroll all the way down. Then, paste the code into the Insert Your Code... box and click the Redeem button:

The Insert Your Code... box and Redeem button in Build a Reactor

Nicole Lucero

Build a Reactor Code Guardian

Nicole Lucero

Code Guardian

Personally finds and maintains every code on this page, with around-the-clock help from the rest of our Code Guardians.

Roblox Den's code tracker continually scans Roblox.com, social channels, user reports, game developer networks and other sources, and we've had 729,199 reports from players on Works, Doesn't work and new codes. But before any code is listed on our site, or marked as Expired, our Code Guardians check in-game that it works and that its rewards and requirements are right. That's why every code you try on Roblox Den works.

  1. Checks every code in-game

    Nicole tests every new Build a Reactor code in-game, and re-checks any code that enough players report as not working.

  2. Keeps this page up to date

    When Build a Reactor changes how codes are claimed, adds a new requirement or launches a new promotion, Nicole makes sure it's covered here first.

  3. Lists exact rewards and requirements

    Every code shows exactly what it gives and any level or gamepass it needs, so you know what you're getting before you redeem it.

Nicole isn't the only Code Guardian around here: Erwin and Renato check new codes for this game whenever Nicole is away or asleep.

Meet the rest of the team

About Build a Reactor

Welcome to Build a Reactor! In this game, your main goal is to build and evolve your very own reactor by collecting and processing materials.

To play, you roll for powerful drills and place them to mine various ores. You then use these collected ores to evolve your Reactor and generate energy. Once you have generated energy, you must wait for the best market price to sell it for maximum profit. Along the way, you can purchase upgrades to boost your progress, discover rarer reactors, drills, and ores, and work your way up to become the ultimate energy tycoon.